Patents by Inventor Defu Cai

Defu Cai has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Integrated ocean bottom towed array for four-component seismic data acquisition
    Patent number: 6607050
    Abstract: An integrated ocean bottom towed four-component array for seismic data acquisition consists of a four-channel electronic section for seismic data collection, a gimbaled three-component geophone and a hydrophone in a housing. The array connects with a submarine cable through a cable joint in order to acquire four components of data consisting of seismic P wave, shear wave and hydrophone in total. Through cable data transmission and processing in a central station, ocean bottom oil and gas structure information can be obtained. Because of the high SNR acquisition in the ocean bottom seismic data acquisition of the present invention, and the waterproof cable interconnections between each of the sections of the present apparatus, data acquisition of high quality can be gained to realize highly efficient and easy ocean bottom towing operations.
    Type: Grant
    Filed: April 19, 2001
    Date of Patent: August 19, 2003
    Assignee: China National Petroleum Corporation
    Inventors: Guoxin He, Zailu Zhang, Peichang Li, Yi Lin, Xiaoquan Han, Defu Cai, Jingping Xiao, Yonglin Zhang
  • Integrated ocean bottom towed array for four-component seismic data acquisition
    Publication number: 20010035311
    Abstract: An integrated ocean bottom towed four-component array for seismic data acquisition consists of a four-channel electronic section for seismic data collection, a gimbaled three-component geophone and a hydrophone in a housing. The array connects with a submarine cable through a cable joint in order to acquire four components of data consisting of seismic P wave, shear wave and hydrophone in total. Through cable data transmission and processing in a central station, ocean bottom oil and gas structure information can be obtained. Because of the high SNR acquisition in the ocean bottom seismic data acquisition of the present invention, and the waterproof cable interconnections between each of the sections of the present apparatus, data acquisition of high quality can be gained to realize highly efficient and easy ocean bottom towing operations.
    Type: Application
    Filed: April 19, 2001
    Publication date: November 1, 2001
    Applicant: China National Petroleum Corporation
    Inventors: Guoxin He, Zailu Zhang, Peichang Li, Yi Lin, Xiaoquan Han, Defu Cai, Jingping Xiao, Yonglin Zhang